[PATCH RESEND] block: Replace deprecated strcpy() in devt_from_devname()

[PATCH RESEND] block: Replace deprecated strcpy() in devt_from_devname()

[Thorsten Blum]

strcpy() is deprecated [1] and uses an additional strlen() internally;
use memcpy() directly since we already know the length of name and that
it is guaranteed to be NUL-terminated.  Also use strnlen() and sizeof()
instead of the hard-coded size while at it.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 block/early-lookup.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/block/early-lookup.c b/block/early-lookup.c
index 3fb57f7d2b12..5c30a0cc85a0 100644
--- a/block/early-lookup.c
+++ b/block/early-lookup.c
@@ -155,10 +155,11 @@ static int __init devt_from_devname(const char *name, dev_t *devt)
 	int part;
 	char s[32];
 	char *p;
+	size_t name_len = strnlen(name, sizeof(s));
 
-	if (strlen(name) > 31)
+	if (name_len == sizeof(s))
 		return -EINVAL;
-	strcpy(s, name);
+	memcpy(s, name, name_len + 1);
 	for (p = s; *p; p++) {
 		if (*p == '/')
 			*p = '!';